public CommandLineOptions() 
{
        filename = null;
        jar = fixInteractive = false;
        interactive = notice = true;
        properties = new java.util.Properties();
        help = version = false;
}

 public boolean parse(String[] args) 
{
        int index=0;
        while (index <  args.length && args[index].startsWith("-")) {
            String arg = args[index];
            if (arg.equals("--help")) {
                help = true;
                return false;
            }
            else if (arg.equals("--version")) {
                version = true;
                return false;
            }
            else if (arg.equals("-")) {
                if (!fixInteractive)
                    interactive = false;
                filename = "-";
            }
            else if (arg.equals("-i")) {
                fixInteractive = true;
                interactive = true;
            }
            else if (arg.equals("-jar")) {
                jar = true;
                if (!fixInteractive)
                    interactive = false;
            }
            else if (arg.equals("-X")) {
                Options.classBasedExceptions = false;
            }
            else if (arg.equals("-S")) {
                Options.importSite = false;
            }
            else if (arg.equals("-c")) {
                command = args[++index];
                if (!fixInteractive) interactive = false;              
                break;
            }
            else if (arg.startsWith("-D")) {
                String key = null; 
                String value = null;
                int equals = arg.indexOf("=");
                if (equals == -1) {
                    String arg2 = args[++index];
                    key = arg.substring(2, arg.length());
                    value = arg2;
                }
                else {
                    key = arg.substring(2, equals);
                    value = arg.substring(equals+1, arg.length());
                }
                setProperty(key, value);
            }
            else {
                String opt = args[index];
                if (opt.startsWith("--"))
                    opt = opt.substring(2);
                else if (opt.startsWith("-"))
                    opt = opt.substring(1);
                System.err.println("jpython: illegal option -- " + opt);
                return false;
            }
            index += 1;
        }
        notice = interactive;
        if (filename == null && index <  args.length && command == null) {
            filename = args[index++];
            if (!fixInteractive)
                interactive = false;
            notice = false;
        }
        if (command != null)
            notice = false;
        int n = args.length-index+1;
        argv = new String[n];
        //new String[args.length-index+1];
        if (filename != null)
            argv[0] = filename;
        else argv[0] = "";
        for(int i=1; i< n; i++, index++) {
            argv[i] = args[index];
        }
        return true;
}

 public  void setProperty(String key,
    String value) 
{
        properties.put(key, value);
        // This only works for Java 1.2.  There appears to be no portable
        // way to support this under Java 1.1
//         try {
//             System.setProperty(key, value);
//         }
//         catch (SecurityException e) {}
}